Carrier Frequency Offset Estimation Using PN Sequence Iteration in OFDM Systems

Author

Wei, Jianghua ; Liu, Yuan

Author_Institution

Sch. of Comput. Eng., Guangxi Univ. of Technol., Liuzhou, China

Volume

2

fYear

2010

fDate

24-25 April 2010

Firstpage

405

Lastpage

409

Abstract

Carrier frequency synchronization is the critical technique in orthogonal frequency division multiplexing (OFDM) systems. In this paper, an improved carrier frequency offset (CFO) estimation method is proposed, which divides the Schmidl´s CFO estimation into coarse and fine estimation by using PN sequence iteration, the new method has higher estimation accuracy and larger estimation range than that of Schmidl´s method in presence of the same computational complexity. The theoretical low bound of CFO estimation is derived by two mathematical methods. The validity of the new algorithm is verified in AWGN and multipath fading channels.

Keywords

AWGN channels; OFDM modulation; channel estimation; computational complexity; fading channels; iterative methods; multipath channels; sequences; AWGN channel; OFDM systems; PN sequence iteration; Schmidl CFO estimation; carrier frequency offset estimation method; carrier frequency synchronization; computational complexity; mathematical methods; multipath fading channels; orthogonal frequency division multiplexing; theoretical low bound; Communication system security; Computational complexity; Computer networks; Electronic mail; Fading; Fast Fourier transforms; Frequency estimation; OFDM; Performance analysis; Wireless communication; PN sequence; carrier frequency offset; orthogonal frequency division multiplexing;

fLanguage

English

Publisher

ieee

Conference_Titel

Networks Security Wireless Communications and Trusted Computing (NSWCTC), 2010 Second International Conference on

Conference_Location

Wuhan, Hubei

Print_ISBN

978-0-7695-4011-5

Electronic_ISBN

978-1-4244-6598-9

Type

conf

DOI

10.1109/NSWCTC.2010.229

Filename

5480853